Eaton ER12-400N3PR Enclosed Rotary Disconnect Switch - NEMA 12
Part Number: ER12-400N3PR
Quick Summary
The Eaton ER12-400N3PR enclosed rotary disconnect switch provides reliable circuit isolation for industrial electrical panels. Many technicians struggle with safe, accessible isolation in cramped control cabinets, increasing maintenance risk and downtime. This unit carries CE marking and is designed for NEMA 12 enclosures, with a 600 V and 400 A rating to handle demanding industrial loads. Its non-fused design reduces replacement parts and simplifies maintenance, while the pistol handle enables quick, secure operation. Ideal for control panels, motor control centers, and distribution assemblies, the ER12-400N3PR delivers robust protection in harsh environments and supports straightforward commissioning, testing, and compliance with modern safety standards.
Product Information
Extended Description
ER12-400N3PR Eaton: Eaton Bussmann series enclosed rotary disconnect switch, Non-fused, Pistol handle, 600V, 400A, Red, NEMA rating 12
Product Name
Eaton Bussmann series enclosed rotary disconnect switch
Catalog Number
ER12-400N3PR
UPC
051712420396
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
19 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
400A
NEMA rating
NEMA 12
Voltage rating
600 V
Special features
Non-fused, Pistol handle
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Eaton Specification Sheet - ER12-400N3PR
Enclosed Rotary Disconnect Switch is designed to provide a reliable, space-efficient isolation point for power circuits. The non-fused design reduces maintenance complexity and spare-part requirements, while the pistol handle enables fast, confident operation in demanding environments. A 600 V, 400 A rating supports typical industrial motor loads and distribution feeders, delivering consistent performance with reduced voltage drop and fewer nuisance trips. The NEMA 12 enclosure offers reliable protection against dust and light moisture in workshop floors and manufacturing lines, helping maintain uptime. CE marking demonstrates compliance with European safety standards, facilitating cross-border projects and audits. The non-fused format simplifies integration with downstream protective devices and MCCs, reducing overall switchgear costs. In rugged industrial settings, these features translate to lower total cost of ownership and predictable maintenance cycles. This model is well-suited for control panels, MCCs, and distribution assemblies where safe, code-compliant isolation is essential.
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FAQs
When installing the ER12-400N3PR, ensure adequate clearance for the pistol handle and clear access to the handwheel for safe operation. Mounting should follow manufacturer guidelines for panel depth and mounting hardware, with proper wiring practices to minimize bending radii and avoid fatigue on the conductors. Confirm there is no obstruction that could impede full isolation or emergency stop functionality, and verify CE compliance for the target region.
Yes. The ER12-400N3PR is designed for standard electrical protection and control panel environments, featuring a non-fused design with a 600 V, 400 A rating and a NEMA 12 enclosure. Its simple pull-to-open operation and compatible enclosure dimensions support straightforward retrofits or new installs in MCCs and distribution panels, reducing integration risk and enabling consistent safety practices across existing switchgear.
The NEMA 12 enclosure provides dust and light moisture protection, which helps maintain reliable operation on shop floors and in manufacturing lines. The unit's rugged, non-fused design reduces points of failure and simplifies maintenance, contributing to higher uptime. CE marking also signals compliance with essential safety requirements, enabling use in multiple regulatory jurisdictions.
ER12-400N3PR carries CE marking and a NEMA 12 enclosure rating, along with a 600 V / 400 A electrical rating. These certifications matter because CE compliance supports European market requirements and cross-border projects, while NEMA 12 ensures enclosure protection suitable for industrial environments. Together, they help ensure safety, reliability, and smoother procurement in regulated facilities.
The non-fused design reduces spare parts and fuse management, lowering maintenance costs and inventory. The pistol handle enables faster, safer operation by technicians, shortening downtime during servicing. Reliable isolation reduces the risk of arc flash exposure and unplanned outages, delivering measurable uptime improvements and a lower total cost of ownership over the switchgear lifecycle.